The author holds up Yesod's low adoption rates (compared to what? Ruby on Rails? Ruby was arguably Flub a few years ago, and Yesod is much younger than Rails) a

The author holds up Yesod's low adoption rates (compared to what? Ruby on Rails? Ruby was arguably Flub a few years ago, and Yesod is much younger than Rails) as an example of how powerful programming languages aren't making as big of a dent as they should be. But the thing is that yesod is a CRUD web app framework, and although Haskell is quite capable at CRUD apps, they're not where it really shines. Look at Haskell (and OCaml and F#)'s adoption rates in the financial sector and you'll see "Flub" kicking some serious ass.